12726440787771 has 6 divisors (see below), whose sum is σ = 18382636693460. Its totient is φ = 8484293858508.

The previous prime is 12726440787761. The next prime is 12726440787833. The reversal of 12726440787771 is 17778704462721.

12726440787771 is a `hidden beast` number, since 1 + 27 + 2 + 64 + 407 + 87 + 7 + 71 = 666.

It is not a de Polignac number, because 12726440787771 - 2¹⁰ = 12726440786747 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12726440787699 and 12726440787708.

It is not an unprimeable number, because it can be changed into a prime (12726440787761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 707024488201 + ... + 707024488218.

Almost surely, 2^{12726440787771} is an apocalyptic number.

12726440787771 is a deficient number, since it is larger than the sum of its proper divisors (5656195905689).

12726440787771 is a wasteful number, since it uses less digits than its factorization.

12726440787771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1414048976425 (or 1414048976422 counting only the distinct ones).

The product of its (nonzero) digits is 51631104, while the sum is 63.

The spelling of 12726440787771 in words is "twelve trillion, seven hundred twenty-six billion, four hundred forty million, seven hundred eighty-seven thousand, seven hundred seventy-one".